Shuttle positioning means



Nov. 20, 1962 H. ZOLLINGER SHUTTLE POSITIONING MEANS 2 Sheets-Sheet 1Filed Sept. 26, 1960 MVEWTUAZ HANS ZULL/IVGEA Nov. 20, 1962 H. ZOLLINGERSHUTTLE POSITIONING MEANS 2 Sheets-Sheet 2 Filed Sept. 26, 19603,064,690 SHUTTLE POSlTlONENG MEAIJS Hans Zollinger, Ruti, Zurich,Switzerland, assignor t Ruti Machinery Works Ltd, formerly CasparHeidegger, Ruti, Zurich, fiwitzerland Filed Sept. 26, 195i Ser. No.58,291 Claims priority, application Switzerland Sept. 25, 1959 7Qlairns. (Cl. 139-155) This invention relates to a device arranged on aloom for dissipating the residual energy of the shuttle in the shuttlebox and for moving the picker out of the range of the shuttle tip priorto the shuttle box change.

Devices for dissipating the residual energy of the shuttle in theshuttle box are already known, but they do not provide a pickerresetting lever for moving the picker out of the range of the shuttletip prior to the shuttle box change.

Devices for moving the picker out of range of the shuttle tip prior to ashuttle box change are also known. These devices are operated withcontrolled resetting means for reliably returning the picker. In thesedevices numerous controlled levers, lifting cams or other mechanicalelements are used, which, for the greater part, are arranged on the sleyand thus vibrate with it. The total mass of these vibrating mechanicalelements is not inconsiderable and causes adverse additional stressingof the sley, a substantial increase of the power consumption of the loomand, premature wear and tear of vital parts of the loom as well as ofthe particular elements for reutrning the picker due to thecollaborating vibrating parts. Undoubtedly the efficiency of the loomand the reliability, especially in the case of high-speed looms, arethus adversely affected.

The device according to the invention comprises a friction brake for theoutwardly moving picker and a picker resetting lever pivotally supportedon the sley, and is principally characterized in that the pivotallysupported picker resetting lever is biased, preferably by an adjustablespring, to inwardly move to return the picker, and is connected througha friction coupling to a swing lever carried on the sley, havingassociated therewith a driving device arranged partly on the loom frameand partly on the sley, which, as the latter moves to its forward deadcenter, imparts to the swing lever a movement for moving the pickeroutwardly.

Further features of the invention will appear from the followingdescription and claims, taken in conjunction with the accompanyingdrawing, wherein two embodiments of the invention are illustrated purelyby way of example.

In said drawing:

FIG. 1 shows in top view the relative position of a shuttle, a pickerand a picker resetting lever immediately after the shuttle has run intothe shuttle box, when using a friction strap as a braking means;

FIG. 2 shows also in top view the relative position of the same parts onreaching the forward dead center of the sley, and the separation ofpicker and shuttle;

FIG. 3 is a top view of the arrangement and design of the parts, whenusing a disk-type braking means;

FIG. 4 shows the same inside view, as seen from the end of the sley.

The device is usable in looms with a pick-and-pick picking mechanism,the device being mounted to co operate with the picking mechanism.

On the upper surface of the sley 1 indicated in broken lines, there isthe resetting lever 2 designed as a singlearrned lever rockably mountedon a pin 3 fixed on the sley. A resetting lever spring 4 tends to swingthe lever 2 clockwise until it comes against a stop 5 adjustable andfixable on the sley 1.

assess E Patented Nov. 20, 1962 Rotatably mounted near the rear side ofthe sley 1, on a pin 7a fixed thereon, is a roller 7 fitted with a nose8, and near the forward side of the sley, a single-armed swing lever 11is pivotally secured on a pin 13 fixed on the sley. The swing lever 11is provided with a cylindrical hub 12 designed as a roller. Both theroller 7 and swing lever 11 are each biased by respective springs. Thetwo springs tend to turn the roller and swing lever 11 clockwise. Thethree springs, i.e. the one acting on roller 7, the one on resettinglever 2 and the one on swing lever 11, may be designed as cylindricalcoil springs, one end of each of which is engaged on the sley. Becauseof the resulting structural simplification, it is however preferable tohave each of said springs designed as a torsion spring, one end of whichis secured respectively to the hub of roller 7 (spring 11]), to the subof the resetting lever 2 (spring 4) and to the hub of the swing lever 11(spring 14), while the other ends engage the sley. This makes itpossible to locate the springs in the interior of the hubs and thusprotect them from unavoidable lint from the loom. The two rollers 7 and12 are connected to each other by a strap 6 whose ends are fxed to thesurfaces thereof. The strap 6 frictionally engages the curved back 2a,2b of the hub surface of the resetting lever 2 and in movementfrictionally rocks the resetting lever 2 counterclockwise.

The spring 14) acting on roller 7 tends, by rotation of roller 7, toturn it clockwise in the sense of winding the strap onto the surfacethereof. Hence this roller 7 is further designated as a take-up roller.This take-up rotation of roller 7 is limited by the nose 3 provided onthe roller periphery, stroking the stop which is fixed to the sley andis adjustable for setting the amount of take-up.

By the pivotal movement of the swing lever 11 whose hub 12 has attachedthereto the other end of the friction strap 6, a pull is exerted on thestrap to tightening it firmly against the back 2b of the resetting lever2. Of the two springs 18 and 14, spring 11 is the stronger. The spring14 only serves to ensure firm contact of the strap against the back ofthe resetting lever 2.

The free end of the swing lever 11 is pivotally connected to acylindrical bushing 16 which, from the sley 1, extends forward towardthe breast beam. Said bushing has a connecting rod 15 which is slidablyguided therein and pivotally supported at 16a on the machine frame 18.Consequently, with the reciprocating movement of the sley 1, theconnecting rod 15 slides in the bushing 16. Adjustably mounted on theconnecting rod 15 is a stop 17 which, by abutting against the free endof the guide bushing 16, limits the displacement of said rod in theguide bushing. In this case, the combination connecting rod 15 and guidebushing 16 acts as a rigid element, whereby, with the sley 1 swingingforward toward the breast beam, the swing lever 11 is oscillatedclockwise. Thus, the friction strap 6 is wound onto the hub 12 againstthe bias of spring 10 on roller 7. The movement of the strapfrictionally engaging the rear face 2b of the resetting lever 2, rocksthe latter counterclockwise, i.e. against the bias of the spring 4acting on the hub of the lever 2. The end of the resetting lever 2bearing on the picker 19, is released therefrom so that the picker 19,under the influence of the picking stock 21 passing through it, will bemoved back to its rearward position and thereby moves clear of theshuttle 20 which is retained in the shuttle box by the braking action ofthe conventional swell.

The action of the described device is as follows:

The flight energy still remaining in the shuttle on its arrival at thechange side of the loom is such that the shuttle when running into theshuttle change box at the picking side is braked, but not entirelybrought to rest so that it comes against the picker 19 which is in con-.11 and machine frame 18.

tact with the resetting lever 2. Picker 19 and lever 2 together aremoved against the bias of the torsion spring 4 of the resetting lever,and the friction between the resetting lever, 2 and the brake strap 6which is initially at rest until the residual flight energy of theshuttle is dissipated.

During the operations hitherto described, the sley 1 has moved fromtherear dead center to the forward dead center. Incidentally the.connecting rod slides unhindered in the bushing 16 pivoted to the swinglever 11 so that only the spring 14 acts on the lever 11 and causes thefriction strap .6 to fr'ictionally engage the back of theresettingleve'r 2.

But before the sley has reached its forward dead center, the adjustablestop.1' 7 at the connecting rod engages the end of the guide bushing,16. The displacement of 'the connecting rod 15 is thus terminated sothat now, as

thesley 1 moves to the forward dead center, the parts 15 and 16constitute a rigid link between the swing lever The lever 11 istherefore swing clockwise to wind the forward end of the friction strap'6 onto the hub of lever 11, thereby causing the strap '6 to move andpivot counterclockwise both the take-up roller 7 against the action ofspring 11 and the resetting lever 2 against the action of spring 4. Inthe pivoting of the resetting lever 2 the picker 19 is pushed bythepicker arm biased by a conventional return spring Incidentally thedrawback lever moves clear of the picker 19 topermit the latter to swingout by the action of the spring-loaded picking lever. It therefore freesthe shuttle tip so that shuttle box change can take place undisturbed.On the return of the sley and the incident pick, also the roller onbrake lever 2d slides 'olf the cam guide so as to enable the brakelever, by the action of the springs 22 and 24, to swing out clockwisetogether with the drawback lever 2c, until the latter hits the stop 5.In this position it is ready again to catch the picker and hence alsothe shuttle in its next return flight, in order, as assisted by thespring 22 engaging it, to brake the residual said frame between forwardand rear dead center posito steadily engage the outwardly swingingresetting lever.

This outward movement of thepicker 19 trees it from the shuttle 2%)retained in the shuttle box by the braking action of the swell.

By the setting of the stop 5 for the resetting lever 2 and the stop '9for limiting the turning of the take-up roller 7, the space between thepicker in its end position and the shuttle in the shuttle change box maybe so large about 1.0 mm.that even when the shuttle tip works into thebody of the picker-presuming normal wear and tear of both parts-a freespace, necessary'for a faultless shuttle box change, can be providedbetween the picker and the shuttle. ,7 7

As the sley next moves rearwuds from its forward ,dead'center, therefollow consecutively the pick and the return of the resetting parts-intothe position ready for a fresh arrival of the shuttle in its alternateflight'from side to side of the loom. 7

.I'n theembodiment of the invention, illustrated in FIGS. '3 and 4 anadjustably loadable disk-type brake is adopted as. a braking means foradrawback lever. a

' For this purpose, the :drawback lever, 20 and the brake lever 2dlarecopivoted about a fixed pivot-3 at the sley so that the, brake. lever,bifurcated at its bearing end, embraces with itssides the drawbacklever.

While the lower hub part2d of the brake lever 2d (as shown in FIG. 4).is rockable direct on pivot 3, the upper hub part 2d has slidablyinserted therein a bushingZg which 7 e is rotatable on pivot 3 and ispositioned thereon with a lower hub :part2d' of the brake lever, biasedtoward each'other by the action of the brake spring 2f,'on the onehand,as well as the two ends of the hub of the drawhack lever 2c, on theother hand, are provided with brake linings, thus creatinga disk-typefriction coupling which,'hand ac'ts'a's a'brake,capable of slipping inthecase of jerky stressing and. also capable of restraining the turningof one of the two levers.

The free end of the brake lever 2d is loaded by arrelativelywea'k spring24Qand carries a travelling roller 2h with which, on approach of thesley to its forward dead center, it runs onto a cam guide 25 fixed tothe machine tions, said device for dissipating the residual flightenergy of a shuttle in the shuttle box and for moving with an outwardlybiased picker clear of said shuttle prior to a shuttle box change, andcomprising: a'resetting lever,

I having oppositely disposed end sections, pivotally mounted .the swinglever; and a drivemeampivotally connecting the other end section of saidswing lever to said stationary frame, and adapted on the movementofjsaid sley to said forward dead center position to pivot said swinglever and, through said frictional coupling, said resetting lever torelease said outwardly biased picker'to move clear of said shuttle. I pg 2. Device according to claim 1 wherein the respective one end sectionof said swing and resetting levers are formed as roller portionsrespectively concentric with the respective pivots of said levers, andsaid frictional coupling comprises a strap frictionally engaging saidroller portions of said levers, and including strap securing means forone endof said strap mounted on said sley and arranged for said rollerportion of the resetting lever to be inter .mediate. said securingmeans. and said roller portion of the swing lever, the other end of saidstrap being secured to said'swing lever. v

3. 'Device according to claim '2 wherein said 'strapsecuring'meanscomprises a roller pivotally mounted for rotation on said sley, saidstrap engagingand sec'ure'd to stop means associated with said rollerfor adjustably limiting saidrotation, and biasing means for biasing saidroller to rotate to said stop in a direction to further en- 7 gage saidstrap.

4. Device according to claiml wherein said drive means comprise abushing pivotally connected by anend to said other endfof'said swinglever, a'connectingrod longitudinally displaceable in'said bushing andhaving a free end 'pivotally connected to said stationary'frame, and anadjustable stop secured to saidconnectingrod intermediate said bushingand said frame for spacing 7 from said bushing the driving distancenecessary to pivot said resetting lever for the outwardly biased pickerto. 7 move clear 'of said shuttle.

5. Device according to claim' 1 wherein said drive means comprises acontrol cam attached to said stationary frame, and a roller mounted forrotation on said other end section of said swing lever and adaptedtoengage said control cam as said sley moves to forward dead centerposition.

6. Device according to claim 5 wherein said resetting lever and saidswing lever are coaxially arranged, and the friction couplingtherebetween comprises brake disks 5 interposed between said levers.

7. Device according to claim 6 wherein said friction coupling includes abushing mounted axially movable in said other end section of one saidlever and in contact with an adjacent brake disc, and an adjustablespring mounted 10 to bias said bushing against said adjacent brake disc.

References Cited in the file of this patent UNITED STATES PATENTSCederlund Dec. 9, 1941 FOREIGN PATENTS France Aug. 4, 1930 Germany Apr.24, 1904 Great Britain Dec. 21, 1933

